Fence column and fence system having the fence column

ABSTRACT

A fence column and a fence system, wherein the fence column is adapted for fixing a protection barrier extending both horizontally and vertically. The fence column comprises a first main body and a second main body fixedly connected onto the first main body. The first main body is provided with a connecting surface on one side where the first main body is connected with the second main body. The connecting surface is vertically arranged with multiple first positioning members. Multiple second positioning members corresponding to the multiple first positioning members are vertically arranged on the second main body; the first positioning members pass through the protection barrier to fix with the second positioning members, or vise versa; the protection barrier is fixed between the first main body and the second main body.

BACKGROUND OF THE INVENTION

The present invention relates to a kind of safety protection equipment used for surrounding a building or a site, and more specifically relates to a kind of fence column and a kind of fence system.

A fence system used for surrounding a building or a site is usually formed by connecting a fencing net and a fence column. A common fence column is shown for example in FIG. 1 of European granted patent EP1564351B1. This kind of fence column comprises a hollow post with a rectangular cross section, a cover plate covering one side of the hollow post and a tightening member for fixing the fencing net between the cover plate and the hollow post. The tightening member is fixed to the hollow post after passing through the cover plate and a hole on the fencing net. A fence system using this kind of structure is susceptible to damage because the fencing net is just loosely fixed due to only a few fixing points on which the fencing net is positioned, connected and fixed via the tightening member alone. In FIG. 2 of EP1564351B1, another fence column is disclosed. According to the disclosure, tightening members are used for positioning, connecting and fixing the fencing net to the post, but this kind of structure still cannot solve the problems of insufficient fixing points for the fencing net and susceptibility to damage. In some fence systems especially those requiring better defense against damage, anti-theft bolts are usually required, but anti-theft bolts are more expensive. Production cost of the fence system will also significantly increase if the quantity of the fixing points is increased by providing more tightening members.

BRIEF SUMMARY OF THE INVENTION

An object of the present invention is to provide a kind of fence column which provides multiple fixing points for fixing a protection barrier.

To achieve said object, the present invention adopts the following technical proposal:

A kind of fence column adapted for fixing a protection barrier which extends both horizontally and vertically; the fence column comprises a vertically extending first main body and a second main body fixedly connected with the first main body; a connecting surface is provided on one side of the first main body where the first main body is connected with the second main body; multiple first positioning members are vertically arranged on the connecting surface; multiple second positioning members corresponding to the multiple first positioning members respectively are vertically arranged on the second main body; the first positioning members pass through the protection barrier to fix with the second positioning members, or the second positioning members pass through the protection barrier to fix with the first positioning members; the protection barrier is fixed between the first main body and the second main body.

Further, the fence column also comprises a tightening member for fixing the first main body and the second main body.

Preferably, the tightening member is a clamp; the clamp comprises a clamping body; two ends of the clamping body pass through meshes of a net being as the protection barrier and then being fixed to outer sides of the first main body and the second main body.

Preferably, the tightening member is a screw bolt tightening member.

Further, one end of the tightening member is fixed with the connecting surface of the first main body after passing through the second main body.

Further, the first main body also comprises a base portion connected with the connecting surface; the end of the tightening member is fixed with the base portion of the first main body after passing through the second main body.

Alternatively, the first main body and the second main body are fixed by welding.

Preferably, the first main body is a hollow post.

Further, cross section of the hollow post has a perimeter appearing as a sealing ring against surrounding environment.

Preferably, the first main body comprises a base portion having two opposed sides; an opening is formed between the two opposed sides of the base portion; the two opposed sides of the base portion extend inwardly or outwardly to form a pair of edge portions; the edge portions are each being the connecting surface; the edge portions define a width of the opening; the second main body is mounted at an opening side of the first main body and covers the opening and the pair of edge portions.

Preferably, the base portion has a cross section which is in a C shape, V shape, M shape, a trapezoid shape having an opening at one side or a rectangular shape having an opening at one side.

Preferably, the multiple first positioning members are arranged vertically on the pair of edge portions, and the multiple second positioning members are divided into two columns vertically arranged on the second main body.

Alternatively, the first main body is a solid post; the first main body has a cross section which is in an I shape, Z shape, T shape, E shape or M shape.

Preferably, the second main body is a sheet like cover plate.

Preferably, the first positioning members are integrally formed on the connecting surface, and the second positioning members are integrally formed on the second main body.

Further, the first positioning members are holes while the second positioning members are protrusions, or the first positioning members are protrusions while the second positioning members are holes.

Preferably, the protrusions are hook shaped.

Preferably, the protrusions are formed by bending and stamping the connecting surface or the second main body; there is no specific requirement concerning the sequential order of bending procedure and stamping procedure.

Preferably, the protrusions are bent horizontally to be hook shaped after inserting into the holes.

Further, the first main body comprises first locking members; the second main body comprises second locking members; when the first main body and the second main body are fixed together, the first locking members and the second locking members are locked together.

Preferably, the first locking members are integrally formed with the first positioning members; the second locking members are integrally formed with the second positioning members.

Preferably, the first positioning members are holes while the second positioning members have barb-shaped protrusions; the widest section of each of the protrusions is wider than a hole diameter of a respective first positioning member.

Preferably, the first main body or the second main body comprises flexible deformable portions which are horizontally or vertically deformable; when the second positioning members are connected with the first positioning members, the second main body is outwardly tensioned or inwardly pressed to connect with the first main body.

Another object of the present invention is to provide a kind of fence system having multiple fixing points for fixing a protection barrier so as to strengthen the safety protection ability of the fence system.

To attain the above object, the present invention adopts the following technical proposal:

A fence system comprising multiple fence units; each of the fence units comprises two fence columns and a protection barrier extending both horizontally and vertically between the two fence columns. Each of the fence columns comprises a vertically extending first main body and a second main body fixedly connected with the first main body; a connecting surface is provided on one side of the first main body where the first main body is connected with the second main body; multiple first positioning members are vertically arranged on the connecting surface; multiple second positioning members corresponding to the multiple first positioning members respectively are vertically arranged on the second main body; the first positioning members pass through the protection barrier to fix with the second positioning members, or the second positioning members pass through the protection barrier to fix with the first positioning members; the protection barrier is fixed between the first main body and the second main body.

Further, the protection barrier is formed by combination of one or more panel units and/or one or more strip units and/or one or more post units and/or one or more wire units.

Further, the protection barrier is a net with meshes; the first positioning members pass through the meshes of the protection barrier to fix with the second positioning members, or the second positioning members pass through the meshes of the protection barrier to fix with the first positioning members.

Preferably, the protection barrier is a welded mesh, a woven mesh, a rollable mesh, a Dutch wire mesh or a metal lath.

Preferably, a distance between any two of the meshes vertically adjacent to each other on the net is the same.

More preferably, a distance between any two of the first positioning members vertically adjacent to each other or a distance between any two of the second positioning members vertically adjacent to each other is multiple integer of the distance between any two of the meshes vertically adjacent to each other.

Further, each of the fence columns also comprises a tightening member for fixing the first main body and the second main body.

Preferably, the tightening member is a clamp; the clamp comprises a clamping body; two ends of the clamping body pass through the meshes of the net and then being fixed to outer sides of the first main body and the second main body.

Alternatively, the tightening member is a screw bolt tightening member.

Preferably, one end of the tightening member is fixed with the connecting surface of the first main body after passing through the second main body.

Further, the first main body also comprises a base portion connected with the connecting surface; the end of the tightening member is fixed with the base portion of the first main body after passing through the second main body.

Alternatively, the first main body and the second main body are fixed by welding.

Preferably, the first main body is a hollow post.

Further, cross section of the hollow post has a perimeter appearing as a sealing ring against surrounding environment.

Preferably, the first main body comprises a base portion having two opposed sides; an opening is formed between the two opposed sides of the base portion; the two opposed sides of the base portion extend inwardly or outwardly to form a pair of edge portions; the edge portions are each being the connecting surface; the edge portions define a width of the opening; the second main body is mounted at an opening side of the first main body and covers the opening and the pair of edge portions.

Preferably, the base portion has a cross section which is in a C shape, V shape, M shape, a trapezoid shape having an opening at one side or a rectangular shape having an opening at one side.

Preferably, the multiple first positioning members are arranged vertically on the pair of edge portions, and the multiple second positioning members are divided into two columns vertically arranged on the second main body.

Alternatively, the first main body is a solid post; the first main body has a cross section which is in an I shape, Z shape, T shape, E shape or M shape.

Further, the second main body is a sheet like cover plate.

Preferably, the first positioning members are integrally formed on the connecting surface, and the second positioning members are integrally formed on the second main body.

Preferably, the first positioning members are holes while the second positioning members are protrusions, or the first positioning members are protrusions while the second positioning members are holes.

Preferably, the protrusions are hook shaped.

Preferably, the protrusions are formed by bending and stamping the connecting surface or the second main body; there is no specific requirement concerning the sequential order of bending procedure and stamping procedure.

Preferably, the protrusions are bent horizontally to be hook shaped after inserting into the holes.

Preferably, the first main body comprises first locking members; the second main body comprises second locking members; when the first main body and the second main body are fixed together, the first locking members and the second locking members are locked together.

Further, the first locking members are integrally formed with the first positioning members; the second locking members are integrally formed with the second positioning members.

Preferably, the first positioning members are holes while the second positioning members have barb-shaped protrusions; the widest section of each of the protrusions is wider than a hole diameter of a respective first positioning member.

Preferably, the first main body or the second main body comprises flexible deformable portions which are horizontally or vertically deformable; when the second positioning members are connected with the first positioning members, the second main body is outwardly tensioned or inwardly pressed to connect with the first main body.

The present invention has the following advantages comparing with existing prior arts:

1. The present invention uses multiple positioning members to connect the protection barrier to a position between the column and the cover plate via multiple fixing points. The increased quantity of fixing points can increase the firmness and flatness of the fixed and installed protection barrier.

2. Hook shaped protrusions are provided on the first positioning members or on the second positioning members so that the assembly of the cover plate and the column can resist and defend against disassembly and damage.

3. The fence column has an opening, thereby saving manufacturing material and at the same time saving welding procedure and lowering the production cost.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is the perspective view of the present invention.

FIG. 2 is a cross sectional view of a fence column of the present invention.

FIG. 3 is a sectional view of A-A in FIG. 2.

FIG. 4 is a perspective view of the tightening member of the present invention.

FIG. 5 is a cross sectional view of a fence column of the present invention (the cross section of the first main body has a trapezoid shape opening at one side).

FIG. 6 is a perspective view of a fence column of the present invention (the cross section of the first main body has an I shape).

FIG. 7 is a perspective view of a fence column of the present invention (the cross section of the first main body has a rectangular shape opening at one side).

FIG. 8 shows a woven mesh.

FIG. 9 shows a metal lath.

FIG. 10 shows a rollable mesh.

FIG. 11 is a sectional view of a fence column of the present invention (the cross section of the first main body has an I shape).

FIG. 12 is a sectional view of a fence column of the present invention (the cross section of the first main body has a Z shape).

FIG. 13 is a front view of the first main body of the present invention (the first positioning members are all in T shape).

FIG. 14 is a side view of the second main body of the present invention (the second positioning members have barbs).

FIG. 15 is a vertical sectional view of a fence column of the present invention (the second positioning members have barbs).

FIG. 16 is a sectional view of a fence column of the present invention (the first main body has a cross section of a hollow T shape).

FIG. 17 is a sectional view of a fence column of the present invention (the first main body has a cross section of a rectangular shape opening at one side and the second positioning members are protrusions).

FIG. 18 is a sectional view of a fence column of the present invention (the first main body has a cross section of a rectangular shape opening at one side and the first positioning members are protrusions).

FIG. 19 is a sectional view of a fence column of the present invention (the first main body has a cross section of a rectangular shape opening at one side, the second main body also has a cross section of a rectangular shape opening at one side, and the first positioning members are protrusions).

FIG. 20 is a sectional view of a fence column of the present invention (the first main body has a cross section of a rectangular shape opening at one side, the second main body also has a cross section of a rectangular shape opening at one side, and the second positioning members are protrusions).

REFERENCE SIGNS IN THE FIGURES

-   -   Fence columns 100     -   First main body 110; base portion 111; connecting surface 112;         edge portions 113; first positioning members 114;     -   Second main body 120; second positioning members 121;         installation hole 122; curved rib portion 124;     -   Top cover 130;     -   Net 200; meshes 201;     -   Tightening member 300; clamping body 301; latch 302; clamp and         wring nut 303; screw nut 304;

DETAILED DESCRIPTION OF THE INVENTION

The present invention will be described further in detail below with reference to the accompanying drawings. In the present description, “front” refers to an upward pointing direction in FIG. 2, “rear” refers to a downward pointing direction in FIG. 2, “vertical” refers to a direction running up and down in FIG. 1, “horizontal” refers to a direction running left and right in FIG. 2. The “horizontal” is perpendicular to the “vertical”.

With reference to FIG. 1, the present invention discloses a kind of fence column and a fence system. The fence system comprises multiple fence units. Each of the fence units comprises two fence columns 100 and a net 200 extending both horizontally and vertically between the two fence columns 100. The net 200 acts as a protection barrier. The fence columns are usually made of metal material (e.g. steel plate). After construction of a base, bottom ends of the fence columns are housed in holes prepared on the base.

Each of the fence columns 100 comprises a vertically extending first main body 110 and a second main body 120 fixedly connected with the first main body 110; a connecting surface 112 is provided on one side of the first main body 110 where the first main body 110 is connected with the second main body 120; the first main body 110 can have different structures, for example a vertically extending hollow post as shown in FIGS. 1, 2, 5, 6 and 7, or a solid post as shown in FIGS. 11 and 12; the first main body 110 can have a cross section which is in an I shape, Z shape, T shape, E shape or M shape; the first main body 110 can be formed by continuously bending a piece of steel plate, or formed by combining and welding two or more pieces of bent steel plates; if the first main body 110 is a hollow post, the first main body 110 circumferentially closes the surrounding environment, in other words, cross section of the first main body 110 has a perimeter appearing as a sealing ring against surrounding environment, as shown in FIG. 6; the first main body 110 can also have a cross section which is in a rectangular shape, a trapezoid shape, a triangular shape or a U shape; as shown in FIG. 16, the first main body 110 is hollow and it is in an inverted T shape, the first main body 110 has an opening at one side which corresponds to the net 200, two edge portions 113 are formed on two sides of the opening respectively, first positioning members 114 are holes which are provided on the two edge portions 113, the second main body 120 has two columns of protruding second positioning members 121, after the net 200 is fixed by the first positioning members 114 and the second positioning members 121, a tightening member 300 passes through a center of the second main body 120 and a center of the first main body 110 sequentially along a direction perpendicular to the net 200 and then being tightened by a clamp and a wring nut thereof; of course, two sets of tightening members may be tightened and fixed at two shoulders at two sides of the first main body 110 respectively, tightening members of each of the two sets are arranged vertically and pass through the second main body 120, the net 200 and the first main body 110 sequentially, the two sets of tightening members form two columns at two sides of the first positioning members 114 or the second positioning members 121 respectively; as shown in FIGS. 17 and 18, the first main body 110 has a rectangular shape with an opening on one side, the first positioning members 114 are holes and the second positioning members 121 are protrusions, or vise versa, the tightening member 300 passes through both the center of the second main body 120 and the center of the first main body 110 and then being tightened by the clamp and the wring nut thereof, alternatively, two columns of screw nuts are stagger respectively to the first positioning members 114 at inner wall sections of the two edge portions 113 respectively, holes are provided on the first main body 110 and the second main body 120 corresponding to the screw nuts are positioned, screw bolts pass through the holes and fit with the screw nuts, thereby fixing the first main body 110 to the second main body 120, the two columns of screw nuts are positioned at two sides of the two columns of the first positioning members 114 or second positioning members 121 respectively, a screw bolt 304 and a clamp and a wring nut 303 form a tightening member 300; as shown in FIGS. 19 and 20, the first main body 110 has a rectangular shape with an opening on one side, the second main body 120 also has a rectangular shape with an opening on one side, the two openings face with each other, the first positioning members 114 are holes and the second positioning members 121 are protrusions, or vice versa, the tightening member 300 passes through the center of the second main body 120 and the center of the first main body 110 sequentially and then being tightened by the clamp and the wring nut 303, alternatively, two sets of vertically arranged tightening members symmetrically distributed can be used for fixing by passing through the second main body 120, the net 200 and the first main body 110 sequentially, the two sets of tightening members are positioned at two sides of the two columns of the first positioning members 114 or the second positioning members 121 respectively.

If the first main body 110 is a hollow post, there can also be an opening at the perimeter of the first main body 110 as shown in FIGS. 1, 2, 5 and 7 for saving steel material and lowering production cost; as shown in FIG. 2, the first main body 110 comprises a base portion 111 having two opposed sides, an opening is formed between the two opposed sides of the base portion 111, the two opposed sides of the base portion 111 extend inwardly or outwardly to form a pair of edge portions 113 (“inwardly” refers to a direction towards the center of the opening in FIG. 2, and “outwardly” refers to a direction pointing away from the center of the opening to the left or right side of FIG. 2), the edge portions 113 are each being a connecting surface 112, the edge portions 113 define the width of the opening, the second main body 120 is mounted at the opening side of the first main body 110 and covers the opening and the pair of edge portions 113; the base portion 111 has a cross section which can be in a C shape, V shape, M shape, a trapezoid shape having an opening at one side or a rectangular shape having an opening at one side etc.

The second main body 120 can be a sheet like cover plate as shown in FIGS. 1, 2 and 6, or it can be a post; each of the fence columns is the fitting and combination of one post being the first main body and another post being the second main body; if the second main body is a cover plate, the cover plate comprises a vertically extending main body; a section of the main body is curved up at one side forming a vertically extending curved rib portion 124; the main body also comprises multiple second positioning members 121, the curved rib portion 124 and the second positioning members 121 are formed integrally with the main body; the curved rib portion 124 can strengthen the cover plate; the curved rib portion 124 is formed by bending or stamping; each of the second positioning members 121 is formed by stamping after bending, or formed by bending after stamping; usually the second main body extends from a bottom end of a respective fence column up to an upper end thereof, in other words, the second main body and the first main body have the same height, as shown in FIG. 1; in some other embodiments, the second main body can be formed by combining multiple shorter cover plates, as shown in FIG. 9.

The net 200 can be a welded mesh, a woven mesh, a rollable mesh, a Dutch wire mesh or a metal lath etc; alternatively, the net 200 can also be a panel, or a flat structure formed by combining multiple panel units, strip units or post units, or a flat structure formed by combining meshed metal and panel units, strip units or post units; preferably, the net 200 is a Dutch wire mesh.

As shown in FIGS. 1, 2, 3 and 6, multiple first positioning members 114 are vertically arranged on the connecting surface 112 where the first main body 110 and the second main body 120 contact with each other; multiple second positioning members 121 fit and connect with the multiple first positioning members 114 respectively; the first positioning members 114 pass through the net 200 to fix with the second positioning members 121, or vice versa, so that the net is tightened and fixed between the second main body 120 and the first main body 110; the multiple positioning members herein are used for increasing the number of fixing points vertically along the net 200 so as to strengthen the fence system and its defense against damage; in general, multiple positioning members refer to three or more than three positioning members. It should be noted that, the positioning members mentioned herein are not the same as a few protruding points or positioning points provided on the first main body or the second main body for positioning the net during installation; the one or two protruding points used for positioning the net during installation are only provided at the uppermost end or the bottommost end of the first main body for holding the net after which the net is pressed by a cover plate and then tightening members are used for tightening and fixing the net such that the net is still being fixed only by the tightening members along its vertical direction.

Preferably, the multiple first positioning members 114 are divided into two columns and each column of the first positioning members is arranged vertically on the connecting surface 112 of the first main body 110; the multiple second positioning members 121 are also divided into two columns and each column of the second positioning members 121 is arranged vertically on the second main body 120; a column of the first positioning members on the left side of the first main body and a corresponding column of the second positioning members on the second main body are used for positioning a net at the left side, another column of the first positioning members on the right side of the first main body and a corresponding column of the second positioning members on the second main body are used for positioning another net at the right side, as shown in FIGS. 1, 6 and 7; in other embodiments, the multiple first positioning members 114 can also be divided into several columns on the connecting surface 112 and the second positioning members 121 are then correspondingly arranged on the second main body 120; alternatively, the multiple first positioning members 114 and the multiple second positioning members 121 are both arranged vertically in one single column, and the nets which the fence column connects with are partially overlapped with respect to each other; the first positioning members 114 pass through the overlapping area of the two nets and connect with the second positioning members 121, or vice versa.

Preferably, the multiple first positioning members 114 are divided into two columns and arranged near to the edges of the connecting surface, and the multiple second positioning members 121 are divided into two columns and arranged near to the edges of the second main body 120; if the first main body 110 is a post having an opening, as shown in FIGS. 1, 5 and 7, the multiple first positioning members 114 are arranged vertically on the pair of edge portions 113, and the multiple second positioning members 121 are divided into two columns vertically arranged on the second main body 120.

In the present embodiment, the first positioning members 114 are holes, while the second positioning members 121 are protrusions; alternatively, the first positioning members 114 are protrusions and the second positioning members 121 are holes; meshes 201 are present on the net 200; when the second main body 120 is fixed to the first main body 110, the protrusions pass through the meshes of the net 200 and insert into the holes and are therefore fixed in position; in other embodiments, both the first positioning members and the second positioning members are hook shaped, when the first main body 110 is fixed with the second main body 120, the first positioning members and the second positioning members are hooked together; preferably, the first positioning members 114 are holes, and the second positioning members 121 are hook shaped protrusions; the hook shaped protrusions first extend horizontally along a direction perpendicular to the vertical direction from a side surface of the second main body 120, and then bend towards the vertical direction to form blocking portions which prevent the second main body 120 from separating from the first main body 110; the multiple second positioning members 121 bend upwardly or downwardly along the same direction; when the second positioning members 121 are inserted into the first positioning members 114, the second main body 120 can be hooked onto the first main body 110.

The ends of the hook shaped protrusions can also extend horizontally; the ends of the protrusions of one column of the second positioning members 121 extend leftward and the ends of the protrusions of another column of the second positioning members 121 extend rightward; the hook shaped protrusions can be formed by bending by means of a tool during the process of installation; during installation of the second main body 120, the second positioning members 121 not yet bent and deformed can first be inserted into the first positioning members 114, and then the two columns of second positioning members 121 are being bent to the left and right sides respectively at an inner side of the first main body 110 by means of a tool so that the second positioning members 121 can hook onto the first main body 110.

The fence columns are generally made of metal material which has a certain flexibility to deform; specifically, the first main body 110 and the second main body 120 may achieve flexible deformation by providing flexible deformable portions horizontally or vertically deformable. In the present embodiment, the base portion 111 of the first main body 110 has an opening; therefore when horizontal compression or tension force is applied to the base portion 111, the base portion 111 can be compressed or tensioned horizontally, thereby changing the linear distance between the two columns of first positioning members 114; the curved rib portion 124 provided on the second main body 120 can provide a certain extent of flexibility to the second main body 120; therefore installation tools can be used for flexible deformation of the first main body 110 to bring the two columns of first positioning members 114 close to each other during installation, and the second positioning members 121 are manipulated to pass through the two columns of first positioning members 114; after installation and removal of external force, the first main body 110 deforms to regain its original shape so that the two columns of second positioning members 121 are tensioned and inwardly hook on two sides of the connecting surface; the same principle applies to installation by deforming the second main body 120. In FIGS. 13 and 14, the first main body 110 as shown has the first positioning members 114 all being T shaped holes, and each T shaped hole has a wider portion and a narrower portion; the second main body 120 as shown has the second positioning members 121 having barbs; the widest part of each of the second positioning members 121 is wider than the diameter of the narrower portion and narrower than the diameter of the wider portion. During installation, tensional force is applied to the first main body 110 by means of a tool so that the first main body 110 are tensioned and open up towards two sides so that the second positioning members 121 of the second main body 120 are inserted into the wider portions of the T shaped holes, when the tool is removed, the opening of the first main body 110 regains its original smaller shape, the second positioning members 121 slide into the narrower portions of the T shaped holes and then being locked therein.

The flexible deformation can occur horizontally or vertically. When the second main body is horizontally tensioned on the first main body, the second main body can be outwardly tensioned on the first main body or inwardly pressed on the first main body, whereas “outwardly” herein means the directions from the center of the opening of the first main body towards the left and right sides of the first main body with reference to FIG. 2, and “inwardly” herein means the directions from the left and right sides of the first main body towards the opening of the first main body with reference to FIG. 2. When the second main body is vertically tensioned on the first main body, the top end and the bottom end of the second main body are outwardly pressed onto the two ends of the first main body respectively, or the top end and the bottom end of the second main body are inwardly hooked onto the first main body, whereas “outwardly” herein means the directions towards the top and bottom ends of the first main body from the center of the first main body with reference to FIG. 6, and “inwardly” herein means the directions towards the center of the first main body from the top and bottom ends of the first main body with reference to FIG. 6.

As shown in FIG. 15, the barbs of the second positioning members 121 are inserted into the first positioning members 114; since the roots of the barbs are wider than the first positioning members 114 in terms of diameter, the barbs can hook onto the connecting surface 112 of the first main body on the inner side of the first main body firmly and not easy to get loose after they are fitted into the first positioning members 114. By means of the few embodiments of the barbs of the second positioning members as mentioned above, self-connection between the second positioning members 121 and the first positioning members 114 can be achieved; self-connection means a type of connection which does not require additional tightening members. Better defense against damage and disassembly can be achieved if the first positioning members or the second positioning members adopt the barb structure as described above.

Preferably, the first positioning members 114 are integrally formed on the connecting surface 112, and the second positioning members 121 are integrally formed on the second main body 120. The protrusions are formed by bending and stamping the connecting surface 112 or the second main body 120. There is no specific requirement concerning the sequential order of bending procedure and stamping procedure.

Preferably, the distance between any two meshes 201 adjacent to each other vertically on the net 200 is the same; the distance between any two first positioning members 114 vertically adjacent to each other or the distance between any two second positioning members 121 vertically adjacent to each other is multiple integer of the distance between any two meshes 201 vertically adjacent to each other, so as to ensure that the all the first positioning members or all the second positioning members can pass through the meshes 201.

Apart from the self-connection as mentioned above, the first main body 110 and the second main body 120 can also be fixed by welding, or connected via a tightening member 300.

As shown in FIG. 7, the tightening member 300 is a clamp. The clamp comprises a clamping body 301, a latch 302 and a screw nut. The two ends of the clamping body 301 pass through the meshes 201 of the net 200 and then being fixed to the outer sides of the first main body 110 and the second main body 120.

Alternatively as shown in FIGS. 1 and 5, the tightening member 300 is a screw bolt tightening member; preferably, the screw bolt tightening member uses the clamp and the wring nut 303 and the screw bolt 304 as shown in FIG. 4.

Specifically, one end of the tightening member 300 passes through an installation hole 122 on the second main body 120 and then fixes with the connecting surface 112 of the first main body 110, as shown in FIGS. 2, 5, 6, 11 and 12.

Alternatively as shown in FIGS. 2 and 5, the first main body 110 is also provided with a base portion 111 connected with the connecting surface 112. An end of the tightening member 300 passes through the second main body 120 and then fixes with the base portion 111 of the first main body 110; for example, the tightening member is fixed at a surface on a side opposite to the connecting surface 112. 

1. A fence column adapted for fixing a protection barrier which extends both horizontally and vertically; the fence column comprises: a vertically extending first main body; a second main body fixedly connected with the first main body; a connecting surface being provided on one side of the first main body where the first main body is connected with the second main body; multiple first positioning members being vertically arranged on the connecting surface; multiple second positioning members corresponding to the multiple first positioning members respectively being vertically arranged on the second main body; wherein the first positioning members pass through the protection barrier to fix with the second positioning members, or the second positioning members pass through the protection barrier to fix with the first positioning members; and the protection barrier is fixed tightly between the first main body and the second main body.
 2. The fence column as in claim 1, wherein the fence column also comprises tightening members for fixing the first main body to the second main body.
 3. (canceled)
 4. The fence column as in claim 2, wherein the tightening members are screw bolt tightening members.
 5. The fence column as in claim 4, wherein one end of each of the tightening members is fixed to the connecting surface of the first main body after passing through the second main body.
 6. The fence column as in claim 4, wherein the first main body also comprises a base portion connected with the connecting surface; one end of each of the tightening members is fixed with the base portion of the first main body after passing through the second main body.
 7. (canceled)
 8. The fence column as in claim 1, wherein the first main body is a hollow post.
 9. The fence column as in claim 8, wherein cross section of the hollow post has a perimeter appearing as a sealing ring against surrounding environment.
 10. The fence column as in claim 8, wherein the first main body comprises a base portion having two opposed sides; an opening is formed between the two opposed sides of the base portion; the two opposed sides of the base portion extend inwardly or outwardly to form a pair of edge portions; the edge portions are each being the connecting surface; the edge portions define a width of the opening; the second main body is mounted at an opening side of the first main body and covers the opening and the pair of edge portions.
 11. The fence column as in claim 10, wherein the base portion has a cross section which is in a C shape, V shape, M shape, a trapezoid shape having an opening at one side or a rectangular shape having an opening at one side.
 12. The fence column as in claim 10, wherein the first positioning members are arranged vertically on the pair of edge portions, the second positioning members are divided into two columns vertically arranged on the second main body.
 13. The fence column as in claim 1, wherein the first main body is a solid post; the first main body has a cross section which is in an I shape, Z shape, T shape, E shape or M shape.
 14. The fence column as in claim wherein the second main body is a sheet like cover plate.
 15. The fence column as in claim 1, wherein the first positioning members are integrally formed on the connecting surface, the second positioning members are integrally formed on the second main body.
 16. The fence column as in claim 1, wherein the first positioning members are holes while the second positioning members are protrusions, or the first positioning members are protrusions while the second positioning members are holes.
 17. The fence column as in claim 16, wherein the protrusions are hook shaped.
 18. The fence column as in claim 16, wherein the protrusions are formed by bending and then stamping or by stamping and then bending the connecting surface or the second main body.
 19. The fence column as in claim 17, wherein the protrusions are bent horizontally to be hook shaped after inserting into the holes.
 20. The fence column as in claim 1, wherein the first main body comprises first locking members; the second main body comprises second locking members; when the first main body and the second main body are fixed together, the first locking members and the second locking members are locked together.
 21. The fence column as in claim 20, wherein the first locking members are integrally formed with the first positioning members; the second locking members are integrally formed with the second positioning members.
 22. The fence column as in claim 21, wherein the first positioning members are holes while the second positioning members are barb-shaped protrusions; the widest section of each of the protrusions is wider than a hole diameter of a respective first positioning member.
 23. The fence column as in claim 21, wherein the first main body or the second main body comprises flexible deformable portions which are deformable horizontally or vertically; when the second positioning members are connected with the first positioning members, the second main body is outwardly tensioned or inwardly pressed to connect with the first main body.
 24. A fence system comprising multiple fence units; each of the fence units comprises two fence columns and a protection barrier extending both horizontally and vertically between the two fence columns; each of the fence columns comprises: a vertically extending first main body; a second main body being fixed to the first main body; a connecting surface being provided on one side of the first main body where the first main body is connected with the second main body; multiple first positioning members being vertically arranged on the connecting surface; multiple second positioning members corresponding to the multiple first positioning members respectively being vertically arranged on the second main body; wherein the first positioning members pass through the protection barrier to fix with the second positioning members, or the second positioning members pass through the protection barrier to fix with the first positioning members; the protection barrier is fixed tightly between the first main body and the second main body.
 25. (canceled)
 26. The fence system as in claim 24, wherein the protection barrier is a net with meshes; the first positioning members pass through the meshes of the protection barrier to fix with the second positioning members, or the second positioning members pass through the meshes of the protection barrier to fix with the first positioning members.
 27. The fence system as in claim 26, wherein the protection barrier is a welded mesh, a woven mesh, a rollable mesh, a Dutch wire mesh or a metal lath.
 28. The fence system as in claim 26, wherein a distance between any two of the meshes vertically adjacent to each other on the net is the same.
 29. The fence system as in claim 28, wherein a distance between any two of the first positioning members vertically adjacent to each other or a distance between any two of the second positioning members vertically adjacent to each other is multiple integer of the distance between any two of the meshes vertically adjacent to each other.
 30. The fence system as in claim 24, wherein each of the fence columns also comprises tightening members for fixing the first main body and the second main body; each of the tightening members is a screw bolt tightening member.
 31. (canceled)
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 51. (canceled) 